Rubber-Reinforcing Cord, Method for Manufacturing Same, and Rubber Article Using Same

Abstract

A reinforcing cord 10 for rubber reinforcement of the present invention includes a reinforcing fiber 11 . A coating film 12 is formed on a surface of the reinforcing fiber 11 . The coating film 12 includes, as its main components, a rubber having acrylonitrile as one of its raw materials and a compound containing an oxazoline group. A method of manufacturing a reinforcing cord for rubber reinforcement of the present invention includes (i) applying an aqueous mixture including, as its main components, a rubber latex having acrylonitrile as one of its raw materials and a compound containing an oxazoline group onto a reinforcing fiber, and (ii) drying the applied aqueous mixture to form a coating film on the surface of the reinforcing fiber.

1 . A reinforcing cord for rubber reinforcement comprising a reinforcing fiber,
 wherein a coating film is formed on a surface of the reinforcing fiber, and   the coating film includes, as its main components, a rubber having acrylonitrile as one of its raw materials and a compound containing an oxazoline group.   
   
   
       2 . The reinforcing cord for rubber reinforcement according to  claim 1 , wherein the compound is insoluble in water. 
   
   
       3 . The reinforcing cord for rubber reinforcement according to  claim 2 , wherein the oxazoline group is a 2-oxazoline group. 
   
   
       4 . The reinforcing cord for rubber reinforcement according to  claim 2 , wherein the rubber includes at least one rubber selected from a group consisting of a hydrogenated nitrile rubber and a nitrile rubber. 
   
   
       5 . The reinforcing cord for rubber reinforcement according to  claim 2 , wherein the coating film includes a resin. 
   
   
       6 . The reinforcing cord for rubber reinforcement according to  claim 5 , wherein the resin is at least one selected from the group consisting of polyurethane resin, epoxy resin, acrylic resin, phenol resin, melamine resin and low molecular weight polyolefin resin. 
   
   
       7 . The reinforcing cord for rubber reinforcement according to  claim 2 , wherein the coating film includes at least one selected from the group consisting of a condensate of resorcinol and formaldehyde, carbon black, a peroxide and isocyanate. 
   
   
       8 . The reinforcing cord for rubber reinforcement according to  claim 2 , wherein the coating film includes at least one selected from the group consisting of vinylpyridine rubber, vinylpyridine-styrene-butadiene terpolymer rubber, butadiene rubber, butadiene-styrene copolymer rubber, dicarboxylated butadiene-styrene copolymer rubber, ethylene-propylene rubber, styrene terpolymer rubber, chlorosulfonated polyethylene rubber, fluorinated rubber and acrylic rubber. 
   
   
       9 . A rubber product in which the reinforcing cord for rubber reinforcement according to  claim 2  is buried in a matrix rubber. 
   
   
       10 . The rubber product according to  claim 9 , wherein the matrix rubber includes a hydrogenated nitrile rubber as its main component. 
   
   
       11 . The rubber product according to  claim 9 , wherein the hydrogenated nitrile rubber includes zinc dimethacrylate dispersed therein. 
   
   
       12 . The rubber product according to  claim 9 , wherein the matrix rubber includes an ethylene-propylene rubber as its main component. 
   
   
       13 . The rubber product according to  claim 9 , which is a toothed belt. 
   
   
       14 . A method of manufacturing a reinforcing cord for rubber reinforcement, comprising:
 (i) applying an aqueous mixture including, as its main components, a rubber latex having acrylonitrile as one of its raw materials and a compound containing an oxazoline group onto a reinforcing fiber; and   (ii) drying the applied aqueous mixture to form a coating film on a surface of the reinforcing fiber.   
   
   
       15 . The method of manufacturing according to  claim 14 , wherein the compound is insoluble in water. 
   
   
       16 . The method of manufacturing according to  claim 15 , wherein the oxazoline group is a 2-oxazoline group. 
   
   
       17 . The method of manufacturing according to  claim 15 , wherein the latex includes at least one selected from hydrogenated nitrile rubber latex or nitrile rubber latex. 
   
   
       18 . The method of manufacturing according to  claim 15 , wherein the aqueous mixture includes a resin dispersed therein. 
   
   
       19 . The method of manufacturing according to  claim 18 , wherein the resin is at least one selected from the group consisting of polyurethane resin, epoxy resin, acrylic resin, phenol resin, melamine resin and low molecular weight polyolefin resin. 
   
   
       20 . The method of manufacturing according to  claim 15 , wherein the aqueous mixture includes at least one selected from the group consisting of a condensate of resorcinol and formaldehyde, carbon black, a peroxide and isocyanate. 
   
   
       21 . The method of manufacturing according to  claim 15 , wherein the aqueous mixture includes at least one selected from the group consisting of vinylpyridine rubber latex, vinylpyridine-styrene-butadiene terpolymer rubber latex, butadiene rubber latex, butadiene-styrene copolymer rubber latex, dicarboxylated butadiene-styrene copolymer rubber latex, ethylene-propylene rubber latex, styrene terpolymer rubber latex, chlorosulfonated polyethylene rubber latex, fluorinated rubber latex and acrylic rubber latex.